package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author zzzhc
 * @version 1.0
 * @description: TODO
 * @date 2022/10/10 11:01
 */
@Slf4j
@RequestMapping("/dish")
@RestController
public class DishController {

    @Resource
    private DishService dishService;

    @Resource
    private CategoryService categoryService;

    @Resource
    private DishFlavorService dishFlavorService;

    @Resource
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping("/add")
    public R<String> addEmployee(@RequestBody DishDto dishDto) {

        log.info("新增菜品 菜品信息：{}", dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //清理所有菜品缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 查询分页信息
     *
     * @param page
     * @param pageSize
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        //分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件，根据sort进行排序
        queryWrapper.orderByAsc(Dish::getUpdateTime);

        //分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝 records???
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id获取菜品信息
     *
     * @param id
     * @return
     */
    @GetMapping("{id}")
    public R<DishDto> getDish(@PathVariable Long id) {
        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);
        return R.success(byIdWithFlavor);
    }


    /**
     * 修改菜品状态
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/modifyStatus/{status}")
    public R<String> modifyStatus(@PathVariable Integer status, @RequestParam(value = "ids") List<Long> ids) {
        System.out.println("----");
        List<Dish> dishes = dishService.listByIds(ids);
        for (Dish dish : dishes) {
            dish.setStatus(status);
            dishService.saveOrUpdate(dish);
        }
        return R.success("test");
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping("/modify")
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    /**
     * 删除套餐
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        log.info("ids:{}", ids);

        dishService.removeWithFlavor(ids);

        return R.success("菜品数据删除成功");
    }


    @GetMapping("/list")
    public R<List<DishDto>> getDishList(Dish dish) {

        List<DishDto> dishDtoList = null;

        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();

        //先从redis中 获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null) {
            //如果存在 直接返回 无需查询数据库
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus, 1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在 查询数据库 缓存到redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);


    }
}
